Gold-saving machine.



L. G. DIBEBT.

GOLD SAVING MACHINE.

APPLIOATION FILED 11116.12, 1912.

1,071,891, i Patented Sept. 2, 1913.

3 SHEETSSHEET 1.

IQ} ATTORNEY COLUMBIA PLANOGRAPH cu.,wAsmN 0000000 c.

L. G. DIBERT.

GOLD SAVING MACHINE.

APPLIOATION FILED AUG/.12, 1912.

Patented Sept. 2, 1913.

3 SHEETS-SHEET 2.

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INVENTOR X974 6. X210? BY ATTORNEY COLUMBIA PLANDGIZAPH C0-,\VA5HINOTON,D. 6'

L. G. DIBERT.

GOLD SAVING MACHINE.

APPLIOATION FILED Ammz, 1912.

1 071 91 Patented Sept. 2,1913.

3 SHEETS-SHEET 3.

WITNESSES INVENTOR 4 Amm- BY M 3/ S g 4V ATTORNEY LULU-UIA PLANOGRM'HC0,, WASHINGTON, n. c

LOYD C. DIBERT, OF SAN FRANCISCO, CALIFORNIA.

GOLD-SAVING MACHINE.

Specification of Letters Patent.

:rovnenr.

Ilatcnted Sept. 2, 1913.

Application filed August 12, 1912. Serial No. 714,577.

[ all whom it may concern Be it known that I, LOYD C. DlBERl, a citizenof the United States, residing in the city and county of San Franciscoand State of California, have invented certain new and usefulimprovements in Gold-Saving Machines, of which the following is a specification.

My invention relates to that class of ma chines for separating preciousmetals from their associated materials in which shaking tables areemployed.

The object of my invention is to provide a sin'iplc, compact, andefficient machine especially adapted for the separation and collectionof gold particles, and to this end my invention consists in the novelgoldsaving machine which I shall hereinafter fully describe by referenceto the accompanying drawings in which Figure 1 is a plan of my machine.Fig. 2 is an elevation of the same looking at the side of thescreen-shoe and at the front of the gold-saving table. Fig. 3 is anelevation of the machine, looking at the head of the screen-shoe and atthe side of the goldsaving table, the latter being partly in section.

1 is a frame. In the upper portion of the frame is the screen-shoe 2which is supported upon spring legs 3, located at the corners of itsends, so that it may have an end shake imparted to it. This motion isgiven it by means of a shaft 4t having a central eccentric orcrank 5,from which a connecting rod (3 extends to the head end of thescreen-shoe frame, as is best seen in Fig. 2. The shoe 2 has within itsupper portion a screen 7 inclined in the direction of its length. At thehead of the screen is a feed receiving plate 8, adapted to receive thematerial from a feed hopper 9 carried by the frame 1 above said plate.The remainder of the screen 7 is divided into transversezones by crossplates 10 which are adapted to receive the water from the nozzles 11 ofthe water pipe system 12. In this water system are several cocks 13which are so disposed as to provide for the regulation of the watersupply in accordance with the needs of the machine. One set of nozzles1a of the water system are arranged to discharge into the hopper 9, asuitable battle plate 15 being there provided, as seen clearly by dottedlines in Fig. 2, to receive the direct impact of the water.

At the lower end of the screen is the chute 16 for the coarse material.Under the screen is the delivery chute 17 for the screened material.This chute is inclined and is directed to and opens out at one side ofthe screen shoe, as is best shown in Fig. 2. In addition to the endshake movement of the screen-shoe 2, it has given to it a jarringmovement by rapid blows of a double ended knocker 18 vibrated by arocking shaft 19 suspended adjustably from hangers 90 of the frame 1,and rocked by the end-shake of the screen-shoe by means of a crank arm21 extending down from it and slidably connected to the shoe frame bymeans of a roller stud 22 working between guides 23, as seen in Fig. 2.T he blows of the knocker 18 are delivered upon suitable studs 24; inthe central bar of the screen-shoe. Below the screenshoe and imlependentthereof, save that the power to drive them is commen to both, is thegoldsaving table 25. This table is also inclined, but it is disposed inthe frame 1 at right angles to the screen-shoe, its head being adaptedto re ccive the screened material and water from the side delivery chute17 of said screenshoe, and its foot being extended to discharge its leadclear of the machine. The table 25 has in general a side-shake, that isa vibration in the direction of its width, said motion being imparted toit by the shaft 1, through an eccentric 26 and connecting rod 27 nearone end of the shaft, and another eccentric 2S and connecting rod 29near the other end of the shaft.

As will be seen by reference to Fig. 2, the table 25 is mounted uponspring legs 30, the peculiarity of which is that they diverge or inclineoutward and downward. The effect of this downward (flivcrgence of thelegs 30 is to give to the table a very different movement than if theywere vertically arranged. in the divergent disposition, it will be seenthat if we suppose, in Fig. 2, the table .25 to be moving to the left,the right side of the table must move down while the left side must moveup, because the spring legs on the right are moving through a descendingarc, while those on the left are moving through an ascending are. Thereverse of this is true when the l. t) O to. the head of the table, inorder to better overcome the tendency of the materialv to pack at saidhead, which tendency it has on account of its recent delivery fromthescreen-shoe above, and because it has at that time not been subjectedto. such agitation as would induce the separation of its componentparticles in accordance with their diiferent coefficients of gravity.This increased movement at the head I here effect by making theeccentric 26 at that end of greater throw than the eccentric 28 at theother end, as I have clearly shown in Fig. 3.

The construction of the gold-saving table 25, I shall now describe. Itis of angular trougl1like section. From its head clownward through aconsiderable distance its bottom is covered with a fabric or wovenmaterial of some nature. This covering I have shown by 31, and I havefound in practies that carpet is a good material to use, in that it iswell adapted to insnare the fine particles of; gold. This carpet is heldin place by a border of molding 32, as seen in Figs. 2 and 3, and bycross cleats 33, which also serve to a certain extent as rifiles.Lightly hinged swinging gates 3t are suspended in the table-sides, theirlower edges resting on the carpet 31. These are best made of lightsheets of metal. Below the carpet zone are the cross riflies 35. Thesebe in any suitable number. They are concaved in cross section, as seenin Fig. 3, to form cups to receive the flow of the material. Their shapeadapts them to receive and hold a small body of quicksilver, which, inpractice, I place in them, in order to catch the precious particles.These ritiles 35 are best formed with respect to their length, as I haveshown in Fig. 2; that is, instead of extending straight across theyincline downwardly from each side to the center in an exaggeratedV-shape- The riffle zone 35 is ended by a cross barrier. 36 of anelevation suflicient to present a decided obstruction to the flow.Following this barrier 36 and between it and an end barrier 37 is anamalgam or copper plate 38, which forms the final device to catch theprecious particles. Means are provided as follows to vary theinclination of the table 25. The table frame proper is carried betweenthe sides 39 of an outer frame. Long bolts 10 clamp these sides upon thetable and hold sage of the lighter particles.

it at any inclination. By manipulating the nuts 41-1, the bolts 40 maybe loosened to change the inclination of the table as desired.

The gold bearing material and Water are fed through the hopper 9 to thehead of the end-shaking screen-shoe 2. They fall on the head plate 8 andthen pass on to the screen 7. In the course of the material over theseveral zones of the screen, it is met by succhute lOwhile the former,passing through the screen falls into the chute 17 and by saidehute isdelivered upon the head of the gold saving table 25. Here, beingsubjected to'the greater agitation at the head of the table, it at onceis lightened up, so that its particles separating, the heavier fall intoand are caught in the nap of the carpet 31. The materi alpassing down byand under the swinging gate 3a is somewhat checked and is rather evenlyspread out and kept light, so that coming to the cup-riiiies 35 andtherein turning around and back to low over and out of said riftles theprecious particles are caught by the quicksilver which they hold, aresult somewhat height ened by the general ei-shape of the rilfleseries, in that the tendency here is to flow centrally as well asforwardly; The cross barrier 36 checks the flow and compels the overflowof the material, thereby tending to retain the heavier while permittingthe pas precious particles as will amalgamate will be caught by theplate 38, and such as will not amal'gamate will lodge against the finalbarrier 37. The rocking movement given to the table 25 by reason of thedivergent legs which. carry it is very efiicient in keeping the materialsuspended.

Having thus described my invention what I claim as new and desire tosecure by Let ters Patent is 1. In a gold saving machine, thecombination of a horizontally disposed screen shoe inclining inthedirection of its length and having a discharge chute extending- Finallysuch stantially between the shoe and table and extending transverselyrelative to the shoe, pitman rods one for the shoe and for the tableeach having eccentric connections with said shaft and adapted tosimultaneously impart shaking movements to the shoe and table inrelative transverse directions aboutthe'ir yieldable supports.

In a gold saving machine, the con'ibina tion of an elongated tableinclining in the direction of its length, spring legs for supportingsaid table at opposite ends, said legs diverging downwardly, a rotaryshaft extending longitudinally of the table, an eccentric adjacent eachend of said shaft, a rod connected at one end. to one of saideecentrics, and at its opposite end to the side of the table, adjacentone end thereof, and a rod connected at one end to the other eccentricand at its opposite end to the same side of the table adjacentitsopposite end, one of said eccentrics being of greater throw than theother, substantially as and for the purpose described.

In a gold saving machine, the combination of an elongated tableinclining in the direction of its length, spring legs for supportingsaid table at opposite ends, said legs diverging downwardly, a rotaryshaft extending longitudinally of the table, an eccentric adjacent eachend of said shaft, a rod connected at one end to one of said eccentrics,and at its opposite end to the side of the table, adjacent one endthereof, and a rod connected at one end to the other eccentric and atits opposite end to the same side of the table adjacent its oppositeend, the said eccentrics being of different throws, a screen above thetable, a shoe interposed between the screen and table to deliver thescreened material to the latter, an auxiliary eccentric on the shaftintermediate the first mentioned eccentrics, and a rod connected at oneend to the auxiliary eccentric and at its opposite end to the end ofsaid screen.

4. In a gold saving machine the combination of a horizontally disposedscreen shoe inclining in the direction of its length and having adischarge chute extending from end to end with an outletsi'ibstant'ially midway of the ends of the shoe and to the side thereof,a gold saving table extending transversely relative to the shoe and of awidth greater than the discharge outlet of the shoe and less than thelength of the latter, the head of the table being directly beneath thedischarge outlet and the table inclining from this point downwardly,yieldable supports for the shoe and table, a rotatable shaft arranged ata point: substantially between the shoe and table and extendingtransversely relative to the shoe, a pitnian rod substantially midway ofthe ends of the shaft having an eccentric connection at one end withsaid shaft, and a connection at its opposite end with the shoe, andauxiliary pitnian rods one adjacent each end of the shaft, the auxiliarypitinan rods having an eccentric connection at one end to the shaft anda connection at the opposite end with the side of the table, one of saidauxiliary pitnian rods being of greater throw than the other,substantially as and for the purpose described.

:7. In a gold-saving machine, a table; a zone of carpet at the receivingend of the table; hinged hanging gates resting their lower edges on thecarpet; a zone of quicksilver-holding ritlles secured to a table at apoint succeeding the carpet zone, said ritlles being concave in sectionfacing the flow of the material and inclined with the direction of saidflow from sides to center of the table; a cross-barrier projectingupwardly from the table and of a height greater than the height of saidrillles succeeding the ritlle zone; an amalgam plate positioned on thetable at a point succeeding the cross barrier; a second crossbz'n'rierprojecting upwardly at the lower end of the plate, the said tableinclining in the direction of its length, and means for impartingtransverse agitation thereto, the agitation at one end of the tablebeing greater than at the other end thereof.

(5. In a gold saving machine, the combination of a screen shoe having atone end a (lischarge chute and at one side a delivery chute underlyingthe screen surface, a table underlying the chute to receive the screenedmaterial therefrom, a common drive means for imparting shaking movementsto the table and screen shoe, a knocker for delivering blows upon thescreen shoe to jar it, said knocker being actuated by the said shakingmovement of the shoe.

7. In a gold saving machine, the combination of an elongated tableinclining in the direction of its length, means for imparting transverseshaking movement to the table at one end, and means for imparting arelatively increased transverse shaking movement at the opposite endthereof, the said table being trough shaped in cross section and havingon the upper surface of ts bottom a layer of gold saving fabric,vertically disposed cross ritlles, and a transversely extending barrier,the cross rillles being of greater height than the fabric and theobstruction of greater height than the cross ritlles.

S. In a gold saving machine, the combination of an elongated tableinclining in the direction of its length, spring legs for supportingsaid table at opposite ends, eccentric driving means adjacent oppositeends of the table for imparting transverse shaking movement, thatmovement at one end of the table being greater than that at the 0ppositeend thereof, a zone of carpet on the upper surface of the bottom of thetable adname to this specification in the presence of acent thereceiving end thereot, hlnged two subscr-l-bmg- Witnesses.

hanging gates resting at their lower ed ge on LOYD G DIBERT the carpet,a series of cross tithes succeeding 5 the carpet Zone, and an amalgamplate suc- Witnesses:

ceedingthe riflie zone. WM. F. BOOTH,

In. testimony whereof I have signed my D, B. RICHARDS.

Copies oi this patent may be obtained for five qencs eaeh, hy addressingthe 'CQ B of P t nts. Washington, D. (3

